– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 10 pm Tue 18 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 10 pm Tue 18 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 10 pm Tue 18 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Warm (max 28°C on Fri afternoon, min 17°C on Tue night). Wind will be generally light. | Days 5–7 Weather SummaryLight rain (total 7mm), mostly falling on Sat morning. Warm (max 26°C on Mon afternoon, min 14°C on Sat night). Wind will be generally light. | |||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||
night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 | | |  | | | |  | |  |  |  |  |  | | | |
clear | clear | clear | clear | clear | clear | clear | some clouds | some clouds | some clouds | mod. rain | risk tstorm | rain shwrs | rain shwrs | rain shwrs | clear | |
Cloud base (m) | 7000 | 6450 | 4800 | 4450 | 5600 | 650 | 600 | 950 | 700 | 950 | ||||||
km/h | ||||||||||||||||
 |  |  |  |  |  | |||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | — | — | — | — | — | — | — | — | — | — | 6 | 1.7 | 0.1 | 0.1 | 0.1 | — |
max °C | 20 | 21 | 24 | 20 | 23 | 26 | 22 | 25 | 28 | 23 | 17 | 16 | 15 | 16 | 20 | 17 |
min °C | 17 | 18 | 24 | 17 | 19 | 26 | 19 | 21 | 27 | 19 | 16 | 16 | 14 | 14 | 19 | 15 |
chill °C | 17 | 18 | 24 | 17 | 19 | 26 | 19 | 21 | 27 | 19 | 16 | 16 | 14 | 14 | 19 | 15 |
Freezing level m | 4350 | 4350 | 4300 | 4250 | 4200 | 4300 | 4400 | 4400 | 4300 | 3950 | 3550 | 3300 | 3550 | 3700 | 3850 | 4200 |
 | — | 6:05 | — | — | 6:07 | — | — | 6:07 | — | — | 6:09 | — | — | 6:11 | — | — |
 | — | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:09 | — | — | 8:07 |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Warm (max 28°C on Fri afternoon, min 17°C on Tue night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Light rain (total 7mm), mostly falling on Sat morning. Warm (max 26°C on Mon afternoon, min 14°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | | ||||
SHIP7080 |
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.